Install Latest LibreOffice 3.5.4 in Ubuntu 12.04/11.10/11.04/10.04

LibreOffice is the free office suite that is compatible with all Microsoft Office files. LibreOffice is installed by default in Ubuntu. In Ubuntu 12.04, the libreoffice installation is version 3.5.3, and this tutorial will show you how to install latest 3.5.4 on Ubuntu 12.04, 11.10, 11.04 and 10.04.